MAHLE 3021229 Performance Napier Steel 2nd Ring Set 4.250in Bore 1.0mm

The MAHLE 3021229 is a performance piston ring set featuring a Napier-style steel second ring designed for high-performance and racing engine builds. MAHLE is a globally recognized leader in OEM and aftermarket engine components, and this ring set is engineered to deliver superior sealing performance and reduced oil consumption in demanding applications.

The Napier (also known as a Napier scraper) second ring design features a stepped, hook-shaped lower edge that improves oil scraping efficiency compared to a standard taper face ring, helping to minimize oil burning while maintaining excellent ring seal under high cylinder pressures.

Key Specifications:

• Bore Diameter: 4.250 inches
• Ring Width (Axial): 1.0mm
• Radial Wall: 0.136 inches
• Ring Style: Plain / Napier Steel Second Ring
• Ring Position: Second ring (compression/oil control ring)
• Material: High-strength steel

Features & Benefits:

• Napier scraper profile improves oil control and reduces oil consumption
• Steel construction provides durability and resistance to heat and wear in high-performance applications
• Precision-manufactured to tight tolerances for consistent ring gap and sealing
• Designed for use in performance, racing, and high-output engine builds
• Compatible with performance pistons using 1.0mm second ring grooves

The MAHLE 3021229 ring set is ideal for engine builders seeking a performance-grade second ring solution for custom or rebuilt engines with a 4.250-inch bore. MAHLE's stringent manufacturing standards ensure consistent quality and long-term durability in both street and competition environments.